Coiling machine and method of coiling rods



April 24, 1945. A. J. ANDERSON I COILING MACHINE AND METHOD OF COILINGRODS 6 Sheets-Sheet 1 Filed June 17, 1942 SIN OW Andrew J. AndersonApril 4, 1945. A. J. ANDERSON 2,374,520

COILING MACHINE AND METHOD OF COILING'RODSw Filed June 17, 1942 6Sheets-Sheet 2 glwum Andrew J. Anders on April'24, 1945- A. 4. ANDERSONCOILING MACHINE AND METHOD OF COILING RODS Filed June 17, 1942 eSheets-Sheet 4 n 5 W m. u 3 J. 4 4V 4 m J A ya 2 M 2 Q 5 R. #2 5d a 2 R3 g 2 g a 3 on 11 m m LII |\rw| I #ww HT @flfl -E q: J llbll ilrl I[1'14 |||Ill\ I PM I l 1: 3 o 5 R I: x E i on g April 24, 1945. A,ANDERSON T 2,374,520

COILING MACHINE AND METHOD OF COILING RODS Andrew J. Anderson I 5gdwguguwlp April 24, 1945. A N E SON 2,374,520

COILING MACHINE AND METHOD OF COILING RODS Filed June 1'7, 1942 v 6Sheets-Sheet 6 gwu /vvbo'f/ Andrew J. Anders on Patented Apr. 24, 1945COILING MACHINE AND METHOD OF COILING RODS Andrew J. Anderson,Minneapolis, Minn. n ApplicationJ me 17, 1942, Serial No. 447,455 i i 19Claims. A (01. 153-64 My invention relates to coiling machines and tothe method of coiling rods and has for an object to provide a coilingmachine by means of which open helixes or coils, such as cork screws,

may be readily formed on relatively heavy stock.

An object of the invention resides inproviding a machine in which thestock to be coiled is attached to a mandrel and the mandrelsimultaneously rotated and given forward axial; movement to produce thedesired helix.

Another object of the invention resides in providing a machine in whichthe mandrel is held from rotation and the same given reverse axialmovement to withdraw the mandrel from1the helix.

Another object of the inventionresides in providinga coiling machineutilizing a screw connected to the mandrel and a nut cooperatingtherewith and in providing mechanism by means of which the nut is firstheld from rotation and the screw and mandrel rotated to procure ahelical movement of the mandrel and by means of which the mandrel issubsequently held from rotation and the nut rotated to procure reverseaxial movement of the mandrel without rotation A'feature of the.invention resides in the construction of the operating and controllingmechanism for effecting the desired performance of the machine. l

An object of the invention resides in the method of coiling rods inwhich the rod is first formed with a bend and thereafter coiled.

Other objects of the invention reside in the novel combination andarrangement of parts and in the details of construction hereinafterillustrated and/r described. a

In the drawings:

Fig. 1 is a plan view of a coiling machine illustrating an embodiment ofmy invention.

Fig. 2 isaview similar to Fig. 1 of a portion of the machineishowing thearrangement of the parts after the formation of a coil.

Fig; 3 is a side elevational view. of the machine shown'in Fig. 1. I p pi i Fig. 4 is a longitudinal elevational sectional view taken on line4-4 of Fig. 1 and drawn to a greater scale.

Fig. 5 is a longitudinal elevational sectional view taken on line 5-5 ofFig. 1 and drawn to the same scale as Fig. 4. v

Fig. 6 is a cross-sectional View of the invention taken on line 66ofFig. 1 and drawn to the same scale as Figs. 4 and 5.

Fig. '7 is a fragmentary end elevational view of. 65,

vention.

the mandrel and stock feeding device of the .ih

Fig. 8 is a fragmentary taken on line 8-8 of Fig. 3.

My invention comprises a framework I lybest shown in Figs. 1 and 3,which consists of twolonplan sectional view gitudinal frame members l2and l3, which may be constructed as I-beanis. These framemembersareconnected together by meansof a num 'ber of transverse frame members l4,l5,'l6, l1,

l8 andl Theframe members l4, I6, I! andlB are preferably I-beams,whilethe frame members I5 and I9 are channel beams." The various framemembers of the invention are secured together by bolting, welding or inany othersuitable manner which, being well known inthe art,

have not been shown in the drawings. The frame ll rests uponthree horses2|, 22 and 23, said horses beingidentical inconstruction. .In Fig. 6,the horse 21 is shown in detail which is constructed from angle stocksheared, bent and welded together at the corners to form a saddle 24 andtwo legs 25 and 26 connected thereto. The flanges of the legs 25 and 26are bent inwardly, as indicated at 21, to form feet whichurest upon thesupporting surface on which the machine stands. 1 i

Mounted on the cross frame members l6; l1 and H! are three bearings 28,29 and :3l which are'secured thereto by means of bolts 3i]. Rotatable inthe bearings 28 and 29 is a sleever32, best shown in Fig. 5, which hasattached to it intermediate the ends thereof a spur gear 33 by means ofwhichsaid sleeve may be rotated. The bearings 28 and 29 have linings 34which rotatably support the sleeve 32 and the gear 33 has a boss 35which engages the ends of these linings and holds the sleeve 32 fromaxial movement. The sleeve 32 has a lining 36 in the same which. isformed with a square hole adapted to receive a square shaft 38. Thecorners of said shaft serve as splines acting between the sleeve 32 andshaft 38, whereb-ythe said shaft maybe rotated and yetpermitted to slideaxiallywithin the sleeve 32. a i

In the bearing 3| (Fig; 4) is'slidably and mat ably mounted a mandrel 37which is connected to the end of the shaft 38 by meansof a coupling 39.This mandrel is formed at the end of the same with a groove M in whichthe stock to be coiled is inserted and by means ofwhich the stock isrotated with the mandrel in theformation of the coil or helix. For thepurpose ofsecuring the rod in the groove 4!, a split clamp sleeve 42 isemployed which is shown in detail movement between the nut 63 and screw68.

in Fig. 7, which has a bore 43 of a diameter sumcient to permit ofsliding of the said sleeve over the protruding end of the mandrel 8i.The said sleeve has a slot M extending along the edge thereof which slotcommunicates with the bore 43. Secured to the sleeve 82 is a key 35which extends into the slot M in the mandrel 31 and serves to hold thestock in place in a manner to be presently more fully described.

The stock is fed onto the mandrel 3'? by means of a sheave 48 which isrotatably mounted on a stud 41 secured to a bracket 38. Bracket 88 isattached to the channel frame member I8 by means of bolts 89. Forpreventing longitudinal movement between the bracket 58 and the bearing3|, two plates are provided which overlie the upper flanges of the framemembers I8 and I9 and are welded along their edges to the edges of saidflanges.

The gear 33 is driven from a countershaft 52 which'is journaled in twobearings 53 and 58 secured to the transverse frame members It and IT.This shaft carries a spur pinion 58 whichis keyed thereto and whichmeshes with the spur gear 33 secured to the sleeve 32. Floating on thecountershaft 52 is a pulley 55 which may be driven from any suitablesource of power not shown. This pulley may be connected to the shaft 52by means ofa clutch 56 which includes two operating fingers 51 adaptedto be spread apart to engage the clutch by means of a sliding cone 58mounted on the end of said shaft. Movement of said cone along said shaftis limited by means of a collar 58 secured to the end of the said.countershaft. It will be readily comprehended that when the cone 58 ismoved toward the clutch 56, that the said clutch becomes engaged toeffect a drive betweenthe pulley 55 and the mandrel 3! and when the saidcone is moved in the opposite direction, mandrel 31 is disengaged fromthe pulley and the drive therebetween terminated.

Mounted on the transverse frame member I4 as best shown in Fig. andattached thereto by means of bolts 8| is abearing 82 similar to thebearings 28 and 28. In this hearing is rotatably mounted a nut 83. Thisnut has collars 84 and 85 thereon which engage the ends of the bearing82 and which limit endwise movement of the said nut. Nut 63 isconstructed with threads 58 which receive and engage the thread 61 of ascrew 88. Screw 68 is connected by means of a coupling 33 with the splined shaft 38. whereby longitudinal movement is given to the said shaftand mandrel 31 connected thereto upon relative rotational The nut 63 isadapted to-be rotated by means of a sheave 'H which is attached to thenut 53 by means of cap screws I2 threaded into the end of said nut.

For driving the sheave II, a countershaft H3 is employed which isjournaled in two bearings M and secured to the ends of the cross framemembers I4 and I5 by means of bolts '33. The counter shaft 10 hassecured to it a sheave 88 which serves to drive the sheave ll through apair of V-belts 16, encircling the said sheaves. By means of thisconstruction, the nut 63 may be rotated to procure relative movementbetween the screw 68 and said nut. Floating on the shaft 10 i a pulley Hwhich may be driven from any suitable source of power and, if desired,from the same source as that furnishing power for the pulley 55. theshaft II! by means of a clutch I8 which includes two operating fingersI9 and a sliding cone tions, so that the cones 8| and 58 must be movedin opposite directions to either engage or disengage the clutches whichthey control.

For the purpose of arresting the mandrel 31 to apply the stock theretoand to remove the coiled structure therefrom, a brake 83 is employed,best shown in Figs. 1 and 3. This brake consists of a brake drum 84 anda brake band 85 encircling the same. The brake band 85 has a lug 86attached to one end thereof which rests upon a bracket 81. This bracketis formed with legs 88 which are supported from the longitudinal framemember I3 by means of two cantilevers 90 and 92 which are bolted to saidframe member by means of bolts 93. Bolts 94 extending through the saidcantilevers and bracket, hold the same in position. The lug 95 liesbelow the upper portion 96 of bracket 81. A bolt 81 passes jointlythrough the upper portion 86- of the bracket 81 and through the lugs 95and 88 of the brake band. A coil spring 88, encircling said bolt andfitted with a washer 98 at the end of the said bolt, urges the lugs ofsaid brake band together, causing the brake band to clamp upon the drum84 and The movement of the nut 63 may be terminated by means of a stopmechanism indicated in its entirety by the reference numeral NH and bestshown in Fig. 6. The collar 65 of the nut 63 has formed on it a lu orfinger I02 which projects radially outwardly therefrom. This finger isadapted to engage the end I83 of one arm I84 of a lever I85. The leverIE5 is pivoted on a pin lllswhich passes through an upright I81 securedto the transverse frame member I4 by means of bolts I88. This lever hasan arm I09 extending in the opposite direction from the arm I 64. Whenthe arm I09 is unobstructed, the lug I02 of nut 63, upon rotation ofsaid nut engages the end I03 of arm I84 and swings this arm downward lyand the arm I89 upwardly and until the finger I82 passes the end I03 ofthe arm I84. If the arm I89 is arrested, the arm I04 stops movement ofthe nut 63, holding the same in the position shown in Fig. 6. A stopIII, secured to the bearing 62 by means of cap screws IIZ, limits theupward movement of the arm I04. The lever I05 is urged to swing in acounter-clockwise direction as viewed in Fig. 6, by means of a tensioncoil spring I I3. This coil spring is secured at one end to said Thepulley 11 may be connected to lever and at its other end to thetransverse frame member I4.

The operation of the various parts of the invention are controlled bymeans of a control device indicated in its entirety by the referencenumber I I4. Thiscontrol device includes a shift rod H5 (Figs. 3 and 4)which is mounted for sliding movement in two guides IIB andl20 attachedto the frame members I! and I8. The shift rod H5 is provided with twolugs Ill and H8 which extend upwardly therefrom and are disposed in thepath of travel of the coupling 39. When the mandrel 3'! reaches itsoutermost position, the coupling 39 engages the lug H8 and moves theshift rod H5 toward the right as viewed in Figs. 3 and 4. When themandrel 31 reaches its other extreme position, the same en=- gages thelug I I1 and moves the shift rod toward the left.

. I The extent of the reverse movement of the mandrel 31 is controlledby means of a stop I8I secured to the frame member I! by means of arestrain rotational movement of the countershaft out of the path ofmovement bolt I82: This stop may be slightlyadjusted by means of a screwI83 which extends through said stop and engages the bearing 29. 'IhestopI8I carries a shoe I84 which engages the coupling 39 and limits inwardmovement of the mandrel Extending beneath the shift rod H is a lever H9,best shown in Figs. 1, 4 and 8. This lever is pivoted by means of a boltI 2| to a stand I22 secured to the longitudinal frame member wisesecured to the stand I46. The free end of the'lever I I9 is disposedbetween the two bars I48 v and I49 and is thereby.

For operating the clutch 18, a'lever I26 is employed illustrated indetail in Fig. 6. This lever guided for swinging movement has anupwardly extending arm I21 and a downwardly extending arm I23. A boltI29 extending through the lever I21 and through a bracket I3I, serves tosupport the lever I26 for swinging move-- ment. The bracket I3I of boltsor cap screws I32. The arm I21 of lever is secured to the longitudinallyextending frame member I3 by means I26 is provided intermediate the endsthereof with I a yoke portion I33 which straddles the cone 8! of clutch16. This yoke portion of the lever engages the two pins I of theoperating member of the cone 8| and serves to move said conelongitudinally along the countershaft 10 when. the lever I26 is swungabout its pivot I29.

A lever I34 similar to the lever I26, is used for operating the cone 58of clutch 56. This lever is pivoted on a bolt I35 which is secured to abracket I36 attached to the longitudinal frame member I3 in the samemanner as the bracket I3I. I The lever I34 is formed with an upwardlyextending arm I 31 and with a downwardly extending arm I 38. The lever I34, similar to the lever I26, is formed with a yoke I39 intermediate theendsthereof which engages the pins I4I of the operating member of cone58. The lowermost arms I28 and I38 of the levers I26 and I34 are Iconnected together by means of a link I42 which is provided-with anadjustment I43 at one end of the same forvarying the length of the saidlink. The end of .thelever H9 is bifurcated as indicated at I44 in Fig.8 to receive the arm I38 of- I lever I34. A connection is thus affordedbetween the lever II 9 and the lever I34, whereby the lever 134 isoperated upon movement of the shift rod II5. It will thus be seen thatlever I34 is operated by means of the shift rod I I5. I I

The lever I34 may be manually manipulated by means of a handle I58 whichis secured to the upper end of the arm I 31 of said lever within easyreach of the operator- For arresting. movement of the lever I05, a lugI65 is provided and which is attached to the arm I21 of lever I 26. Thislug is movableinto and of the lever I05 as the lever I26 is moved.Operation of the brake 83 follows: Extending lever 90 is a bracket I5Ito which is pivoted by means of a bolt I52 a bell crank I53. This bellis accomplished as crank has two arms I54 and I55. The arm I54downwardly from the canti- The other. arm

ment of the bell crank I53 and corresponding movement of-the bolt 91 ofthe brake 83.

The operation of my improved coiling machine is as follows: In Fig 4, Ihave shown a portion of a rod 1 6I upon which it is desired to form anopen coil or helix in the nature of a cork screw. To permit of formingthe same, the rod is first placed in a punch press and given a bend, asindicated at I62, to form two angularly disposed reaches I63 and I64.The band I62 is so situated that the screw can be formed on the reach463. In mounting the rod in the machine, the reach I64 isinserted in thegroove 4| in mandrel '31. The bend I62 is of such angle that the reachI63 will lie in the plane of the sheave 46. When the rod has beenproperly positioned, the sleeve 42 is inserted over the end of themandrel 31 and the key brought to bear upon the reach I64 of rod I 6| tohold the same in position. I Lever I34 is now manipulated by means ofthe handle I56 and caused to swing ina counterclockwisedirection, asviewed in Fig. 3. This moves the cone 58 against the fingers 51of clutch56 and causes engagement of the clutch. At the same time, link 1 I42 ismoved toward the right, as viewed in Fig. 3, which pulls the link I56downwardly and drives the countershaft 52, which, through the gears 50and 33, drives the splined shaft 38. This causes rotation of the mandrel31 and also of the screw 68. Nut 63, being stationary, the threads 66therein engaging the threads 61 on the screw 66, cause forwardlongitudinal movement of the shaft 38 and the mandrel 31. Upon rotationof the mandrel 31, the reach I63 of the rod I6I is urged against thesheave 46 and said reach wound upon the mandrel in the form of an openscrew or helix I68. Coiling of the reach I63 continues until thecoupling 39 engages the lug H8. This causes movement of the shift rod H5in the di rection of travel of the mandrel 31 and causes acounterclockwise movement of thelever II 9, as viewed in Fig. '1. LeverII9, through the forked connection with the lever I34, causes clockwisemovement of the lever I34 and similar movement of the lever I26. Suchmovementof the lever I34 disengages the clutch 56. This terminatesrotational movement of the countershaft 52 and also of the gear 33 whichis splined to the shaft 38. During such movement of the link- I42, thebell crank I53 is moved in a clockwise direction, which and permits thenut 63 18. The clutch 16, upon being' engaged,'drives the countershaft land the sheave 80. This, in turn, drives the sheave H 'and the nut 63.Rotation of said nut causes reverse movement of the screw 68 and themandrel'tl. The end of the coil designated by the reference numeral 169is arranged to engage the end surface [61 01 the bearing 3! whichsurface is so shaped as to cause ejection of the coil from the mandrel31.. As the mandrelreverses, the formed structure is removed and thenext rod inserted and keyed to the mandrel by means of the sleeve 42.When the mandrel approaches its extrerne position toward the left, asviewed in Fig. 1, the coupling 39 engages the lug M1 on shift rod H5 andmoves the shift rod toward the left, as viewed in this figure- Thisswings the levers I34 and I26 in a manner to disengage clutch l8.Rotation of the nut 63 now ceases. The movement of the cone 58 of clutch56 is great enough so that the clutch 56 does not become engaged whenthe clutch 18 is thrown out. Thus, when the reverse movement of themandrel is completed, the clutch 56, being in neutraland the clutch 18being moved into neutral, both the screw 68 and the gear 33 will stop.The machine is then in neutral position. Only after the operator movesthe handle I58 toward the left, as viewed in Fig. 3, will the machineagain be set into operation. Itcan readily be comprehended that thetravel of both the cones Bi and 58 may be regulated, so that terminationof the forward movement of the mandrel throws the device into neutralinstead of immediately reversing the machine. However, greater speed canbe attained in the operation of the machine by making the reversemovement automatic. It can also be comprehended that the movement ofthese cone members can be adjusted so that the advance movement of themandrel will also be automatically effected Without action on the partof the operator.

The advantages of my invention are manifest.

The machine is rapid in action and can be used with considerable economyin time. The machine may be loaded during reverse movement of themandrel and is adapted to be quickly setinto operation upon completionof the cycle of movement of the parts thereof. The machine is fairlysimple in construction and operation and is positiVe and effective inaction. The entire construction of the machine is designed to resistabusive use and operate continuously without appreciable attention. Withmy invention; the mandrel ceases to operate upon return movementthereof, thus permitting the operator to apply the stock and remove thework during the reverse movement of the mandrel.

Changes in the specific form of my invention, as herein described, maybe made within the scope of what is claimed, without departing from thespirit of my invention.

Having described my invention, what I claim as new and desire to protectby Letters Patent is:

1. In a coiling machine, revoluble means including a mandrel and a screwrevoluble with said mandrel, means for securing the stock to be coiledto the mandrel, driving means for rotating said revoluble means, arevoluble nut cooperating with said screw, locking. means for lookingsaid nut from rotation, means for actuating said driving means toprocure simultaneous rotation and forward axial movement of said man- Idrel, means for disconnecting said driving means from said revolublemeans, means for unlocking said nut and means for rotating said not toprocure reverse axial movement of said mandrel.

2. In a coiling machine, revoluble'means including a mandrel and a screwrevoluble and axially movable with said mandrel, means for securing thestock to be coiled to the mandrel, driving means for rotating saidrevoluble means, a revoluble nut cooperating with said screw, lockingmeans for locking said nut from rotation, driving means for rotatingsaid nut, a brake for restraining rotational movement of said mandrel, amovable control device movable in opposite directions and connected tosaid two driving means, locking means and brake means, said controldevice, upon movement in one direction operating said locking means tohold the nut from rotation and connecting said first named driving meansto said revoluble means, said control means, upon movement in theopposite direction, disconnecting said first named driving means fromthe revoluble means, operating said brake and connecting said seconddriving means to said nut, and means operated upon axial movement ofsaid revoluble means for moving said control device in oppositedirections,

3. In a coiling machine, a mandrel, means for securing the stock to becoiled to the mandrel, a splined driving shaft connected to the mandrel,a revoluble driving member splined to the splined shaft and held fromaxial movement,'a screw connected to the splined shaft, a nut rotatablerelative to said screw and held from axial move ment, means for drivingsaid revoluble driving member, means for driving said nut, a brake forholding said revoluble driving member from rotation and locking meansfor holding said nut from rotation.

4. In a coiling machine, revoluble means including a mandrel and a screwrevoluble with said mandrel, means for securin'g'the stock to be coiledto the mandrel, a source of power, a driving member on said revolublemeans, a clutch between said source of power and said driving member, anut cooperating with said screw, a driving member connected to said nut,a clutch between said source of power and said second driving member, amovable control member movable in opposite directions, means operated bysaid control member for engaging one clutch and disengaging the otherupon movement in one. direction and for disengaging the first clutch andengaging the second clutch upon movement in the opposite direction andmeans operated upon axial movement of said mandrel in oppositedirections for operating said control member in opposite directions.

nut and a movable control member movable in opposite directions, saidcontrol member, when I moved in one direction, engaging the clutch foroperating the driving member rotating said revoluble means and renderingeffective the locking means for restraining rotational movement of thenut, said control member, when moved in the moved into the path ofopposite direction, operating said brake to restrain rotational movementof the revoluble means and engaging said clutch for rotating said nutandmeans operated upon axial movement of the mandrel for operating saidcontrol member.

6.111 a coiling machine, revoluble means including a mandrel and a screwrevoluble and axially movable with said mandrel, means for securing thestock to be coiled to the mandrel, driving means for rotating saidrevoluble means, a revoluble nut cooperating with said screw, lockingmeans for locking said nut from rotation, driving means for rotatingsaid nut, a brake for restraining rotational movement of said mandrel, ashift rod, mean for guiding said shift rod for movement in a directionparallel to the axis ofsaid mandrel, means forming opposing facingshoulders and carried bysaid shift rod, means on said revoluble meansforming two other shoulders for cooperating with said shoulders on saidshift rod, the shoulders of one pair of said shoulders being spaced fromone another to procure move ment of said shift rod at the ends of theaxial movement of said revoluble means and linkage means connectedbetween said shift rod, said two driving means, locking means and brakefor procuring alternate forward and reverse movement of said mandrelupon movement of said shift rod in opposite directions.

7, In a coiling machine, revoluble means including a mandrel and a screwrevoluble and axially movable with said mandrel, means for securing thestock to be coiled to the mandrel, driving means for rotating saidrevoluble means, a revoluble nut cooperating with said screw, a lugrevoluble with said screw, a lever having an arm engageable with the lugof said screw, said power driven means including a revoluble. membeiforimparting to the mandrel both rotational and forward axial movement,brake means for holding said mandrel from rotational movement andpower-driven means including a revoluble member for imparting to themandrel solely reverse axial movement to permit of securing the stock tothemandrel during-reverse axial movement of the mandrel. l I

.11. In a coiling machine, revoluble means in-' cluding a mandrel and ascrew revoluble and axially movable with said mandrel, means forsecuring the stock to be coiled a revoluble nut cooperating with saidscrew, means for holding said nut from rotation and for rotating saidrevoluble means and means for holding said revoluble meansfrom rotationand for rotating said nut.

12. In a coiling machine, revoluble means including a rotatable membermovable axially for forming a coil, and'a screw revoluble with andaxially movable with sai rotatable member, a

revoluble nut cooperating with said screw, means for holding said nutfrom rotation and for rotating said revoluble means, and means forholding said revoluble means from ing said nut to move said ally.

rotatable member axi- 13. In a coiling machine; revoluble meansincluding a rotatable member for forming a coil, driving means forrotating said revoluble member, means including a spline for guidingsaid rotatable member for axial movement relative to lug upon rotationof the screw, swinging the lever V to cause the arm to clear said lug,means for holding said lever from movement to lock said nut fromrotation, driving means for rotating said nut and means for controllingthe actuation of both of said driving means and the means for holdingsaid lever from movement.

8. In a coiling machine, revoluble means including a mandrel and a screwrevoluble and axially movable with said mandrel, means for securing thestock to be coiled to the mandrel, driving means for rotating saidrevoluble means, a revoluble nut cooperating with said screw, a lugrevoluble with said screw, a lever having an arm engageable with the lugof said screw, said lug upon rotation of the screw, swinging the leverto cause the arm to clear said lug, driving means for rotating said nut,a movable member for actuating said driving means and means operableupon movement of said movable member to hold said lever from movement.

9. In a coiling machine, revoluble means including a mandrel and a screwrevoluble and axially movable with said mandrel, means for securing thestock to be coiled to the mandrel,

power, a clutch operating between said source of power and said drivingmeans for rotating said nut, a movable member a lug on said movablemember, said lug being movement of said lever upon disengagement of saidclutch.

10. In a coiling machine, a mandrel, means for operating said clutch,

position, means for said driving means, a screw revoluble with andaxially movable with said rotatable member, a revoluble nut cooperatingwith said screw, means for restraining said nut from axial movement,means for holding said nut from rotation and for rotating said drivingmeans, and means for holding said driving means from rotation and forrotating said nut upon release of said nut and restraint of said drivingmeans.

14. In a coilingmachine, revoluble means including a rotatable membermovable axially for forming a coil, and ascrew revoluble with andaxially movable with said rotatable member, driving means for rotatingsaid revoluble means,

a revoluble nut cooperating with said screw,

locking means for locking said nut from rotation, means for actuatingsaid drivingmeans to procure simultaneous rotation and forward axialmovement of said rotatable member, means for disconnecting said drivingmeans from said revoluble means, means for unlocking said nut and meansfor rotating said nut to procure reverse axial movement of said mandrel.

15. In a coiling machine, a mandrel having a longitudinal groove in oneend thereof 'fOr the reception of one reach of a rod having a bendtherein, a sleeve applicable over the free end of the mandrel andengaging the reach of the rod received within the groove to hold thesame in position, means for rotating and imparting to the mandrel axialmovement, and guide means for engagement with the outwardly extendingportion of the rod.

16. In a coiling machine, a mandrel having a longitudinal groove in oneend thereof for the reception of one reach of a rod having a bendtherein, a sleeve applicable over the free end of the mandrel andengaging the reach of the rod received within the groove to hold thesame in rotating and imparting to the mandrel axial movement, and guidemeans to the mandrel,

rotation and for rotatfor engagement with the outwardly extendingportion of the rod, said sleeve having a longitudinal slot therein of awidth greater than the diameter of the rod and less than the diameter ofthe mandrel.

17. The method of coiling rods which consists in forming a bend in therod to provide two reaches, in attaching one reach to a mandrelrotatable and axially movable along a bearing and with the bend nearestthe bearing and with said reach extending outwardly from the bearing andwithits axis parallel to the axis of the mandrel, in guiding the otherreach of the rod for movement toward the mandrel along the direction ofits extent, in rotating and advancing the free end of the mandrel in adirection away from the bearing and in detaching the first named reachfrom the mandrel,

18. In a coiling machine, a mandrel, means for securing the stock to becoiled to the mandrel, rotational driving means for imparting to themandrel rotational movement, means simultaneously operable with therotational driving means for imparting to the mandrel forward coincidental axial movement, means for terminatin operation of saidrotational driving means to arrest rotational movement of the mandrel,and rotational driving means for impartingto the mandrel reverse axialmovement while the mandrel is held from rotation.

19. The method of coiling rods which consists of forming a bend in therod to provide two angularly disposed reaches,'in arranging one reachadjacent and parallel to'a mandrel rotatably and axially movable along abearing and with the bend nearest the bearing and with said reachextending outwardly from the bearing, in applying to the denoted reachattachin means for securing said reach to the mandrel, in guiding theother reach of the rod for movement toward the mandrel along thedirection of its extent, in rotating and advancing the free end of themandrel in a direction away from the bearing and upon completion of thecoil in detaching the first named reach from the mandrel.

ANDREW J. ANDERSON.

